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allows calling contract method at any block number

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Diep Pham 2018-09-27 17:10:17 +07:00
parent d3441ebb56
commit 5a13b3b5be
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GPG key ID: 7907B85E3DDDE757
1 changed files with 5 additions and 4 deletions
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9
accounts/abi/bind/base.go
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@ -36,8 +36,9 @@ type SignerFn func(types.Signer, common.Address, *types.Transaction) (*types.Tra
// CallOpts is the collection of options to fine tune a contract call request. // CallOpts is the collection of options to fine tune a contract call request.
type CallOpts struct { type CallOpts struct {
Pending bool // Whether to operate on the pending state or the last known one Pending bool // Whether to operate on the pending state or the last known one
From common.Address // Optional the sender address, otherwise the first account is used From common.Address // Optional the sender address, otherwise the first account is used
BlockNumber *big.Int // BlockNumber selects the block height at which the call runs
Context context.Context // Network context to support cancellation and timeouts (nil = no timeout) Context context.Context // Network context to support cancellation and timeouts (nil = no timeout)
} }
@ -148,10 +149,10 @@ func (c *BoundContract) Call(opts *CallOpts, result interface{}, method string,
} }
} }
} else { } else {
output, err = c.caller.CallContract(ctx, msg, nil) output, err = c.caller.CallContract(ctx, msg, opts.BlockNumber)
if err == nil && len(output) == 0 { if err == nil && len(output) == 0 {
// Make sure we have a contract to operate on, and bail out otherwise. // Make sure we have a contract to operate on, and bail out otherwise.
if code, err = c.caller.CodeAt(ctx, c.address, nil); err != nil { if code, err = c.caller.CodeAt(ctx, c.address, opts.BlockNumber); err != nil {
return err return err
} else if len(code) == 0 { } else if len(code) == 0 {
return ErrNoCode return ErrNoCode